Credit card scam?

My Aunt Lu sent this one the other day:
"This one is pretty slick since they provide YOU with all information, except the one piece they want.Note, the callers do not ask for your card number; they already have it. By understanding how this Credit Card scam works, you'll be better prepared to protect yourself.The scam works like this: Person calling says, " I'm calling from the Security and Fraud Department at VISA. My Badge number is 12460. Your card has been flagged for an unusual purchase pattern, and I'm calling to verify. This would be on your VISA card which was issued by (name of bank). Did you purchase an Anti-Telemarketing Device for $497.99 from a Marketing company based in Arizona?"

Did I "Snopes" it out? Of course! See the results here:
http://www.snopes.com/crime/warnings/creditcard.asp